package collection;

import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.ArrayList;

public class SortPoint {
    public static void main(String[] args) {
        List<Point> list = new ArrayList<>();
        list.add(new Point(1, 2));
        list.add(new Point(9, 4));
        list.add(new Point(5, 60));
        list.add(new Point(13, 8));
        list.add(new Point(9, 10));
        System.out.println("原始List:"+list);
        Collections.sort(list, new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                int len1 = o1.getX()*o1.getX()+o1.getY()*o1.getY();
                int len2 = o2.getX()*o2.getX()+o2.getY()*o2.getY();
                //return len1-len2; //升序
                return len2-len1;   //降序
            }
        });
        System.out.println("按距离排序后List:"+list);
    }
}
